Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fce63d9c45c1c43…

MALICIOUS

PDF

93.6 KB Created: 2021-04-18 17:53:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a391b23653e512e0474e9b662d84727f SHA-1: 6a9ccff93181e7ffc19eaf6940b8c9ca2cd37a50 SHA-256: 1fce63d9c45c1c4351dac079518e5933f60dee910043a561ee43ec0651bdbbad
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains embedded URLs pointing to suspicious domains, indicating an attempt to redirect the user to malicious content. The presence of PDF_URI and EMBEDDED_URL heuristics further supports this, suggesting the document's primary purpose is to facilitate access to external malicious resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://midufefew.ru/strik?utm_term=sword+fighting+games+xbox+one
    • http://josuwuwopow.22web.org/bosquejos_biblicos_cortos_para_predicar.pdf
    • http://fotubobuwenapu.scienceontheweb.net/wobosi.pdf
    • http://fisujerekuvij.getenjoyment.net/gurelevoxovolebozeseti.pdf
    • http://funapuz.iblogger.org/phq_9_depression_test.pdf
    • http://sidufapas.mywebcommunity.org/carbon_nanotubes_uses.pdf
    • http://bexemusu.mypressonline.com/83335485083.pdf
    • http://fuzubijixulux.mygamesonline.org/90399379641.pdf
    • http://kunozoxutokusu.mygamesonline.org/pdf_file_to_word_free.pdf
    • http://tells.fun/what_are_some_other_words_for_left_outslruq.pdf
    • http://hotgirls.host/bijidakosigenesb2wok.pdf
    • http://zebrait.fun/principios_de_anatomia_y_fisiologia_tortora_gratispz92r.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tawovojo/cyberpunk_2077_is_johnny_silverhand_a_bad_guy.pdf
    • http://wewonak.rf.gd/lamilor.pdf
    • https://s3.amazonaws.com/vuliwisuwig/sanidry_cx_dehumidifier_parts.pdf
    • https://s3.amazonaws.com/fasudikek/lesonoma.pdf
    • https://s3.amazonaws.com/wakuzidi/tipos_de_motores_electricos_de_corriente_continua.pdf
    • http://kadizilurojiniz.onlinewebshop.net/arzava_krall.pdf
    • https://s3.amazonaws.com/vukusa/arduino_uno_analog_input_voltage_limit.pdf
    • http://tivakifuzir.atwebpages.com/how_to_get_ready_for_data_science_interview.pdf
    • http://venugowus.epizy.com/96989903833.pdf
    • http://sazasewugekupej.onlinewebshop.net/kidde_smoke_alarm_i12060_home_depot.pdf
    • http://fujeraxujixu.epizy.com/gikaseto.pdf
    • https://s3.amazonaws.com/satudifin/sodastream_fizzi_vs_source_review.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001300f.bin
f7ebfb816169b7f2465a0bc56728b4b2dcdfc9cc97344d365ecb15034579a008		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1300F 5692 bytes
font_01_sfnt_off00014356.bin
e2aab29a2b411b207f5647ac58d6bb1b2a080a37380eab154ba9cb93fa52911c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14356 11164 bytes

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